[Closed] MTB to Road Bike question Re Sizing

I have often heard that folk moving from MTB's to road bikes find themselves setting up the road bike like their MTB and not necessarily getting along with things 😕

I am looking into a frame only option at the moment for a road bike.

I currently ride a 19'' or 20'' (CtoT) MTB frame with a 22.5'' to 23.5'' top tube (CoC).

What should I be looking at road bike frame wise?

I am 6' 3'' ish with a 34'' ish leg measurement.

I know the advise is usually go and try one in your LBS but thats not an option at present.

Any help is much appreciated.

Cheers,

MArk